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    <h1>
      <a href="index.html">All files</a> legacy.js
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    <div class='clearfix'>
      <div class='fl pad1y space-right2'>
        <span class="strong">69.23% </span>
        <span class="quiet">Statements</span>
        <span class='fraction'>18/26</span>
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      <div class='fl pad1y space-right2'>
        <span class="strong">43.75% </span>
        <span class="quiet">Branches</span>
        <span class='fraction'>7/16</span>
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      <div class='fl pad1y space-right2'>
        <span class="strong">20% </span>
        <span class="quiet">Functions</span>
        <span class='fraction'>1/5</span>
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      <div class='fl pad1y space-right2'>
        <span class="strong">69.23% </span>
        <span class="quiet">Lines</span>
        <span class='fraction'>18/26</span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict';
&nbsp;
const util = require('util');
const TransportStream = require('./');
&nbsp;
/**
 * Constructor function for the LegacyTransportStream. This is an internal wrapper
 * `winston &gt;= 3` uses to wrap older transports implementing log(level, message, meta).
 *
 * @param  {Object} opts Options for this TransportStream instance.
 *   @param {Transpot} opts.transport winston@2 or older Transport to wrap.
 */
var LegacyTransportStream = module.exports = function LegacyTransportStream(opts) {
  opts = opts || {};
  if (!opts.transport || typeof opts.transport.log !== 'function') {
    throw new Error('Invalid transport, must be an object with a log method.');
  }
&nbsp;
  TransportStream.call(this, opts);
&nbsp;
  var self = this;
  this.transport = opts.transport;
  this.level = opts.transport.level;
  this.handleExceptions = opts.transport.handleExceptions;
&nbsp;
  console.error([
    `${opts.transport.name} is a legacy winston transport. Consider upgrading: `,
    '- Upgrade docs: https://github.com/winstonjs/winston/tree/master/UPGRADE.md'
  ].join('\n'));
&nbsp;
  //
  // Properly bubble up errors from the transport to the LegacyTransportStream
  // instance, but only once no matter how many times this transport is shared.
  //
  function <span class="fstat-no" title="function not covered" >transportError(</span>err) {
<span class="cstat-no" title="statement not covered" >    self.emit('error', err, self.transport);</span>
  }
&nbsp;
  <span class="missing-if-branch" title="else path not taken" >E</span>if (!this.transport.__winstonError) {
    this.transport.__winstonError = transportError;
    this.transport.on('error', this.transport.__winstonError);
  }
};
&nbsp;
util.inherits(LegacyTransportStream, TransportStream);
&nbsp;
/*
 * @private function _write(info)
 * Writes the info object to our transport instance.
 */
LegacyTransportStream.prototype._write = <span class="fstat-no" title="function not covered" >fu</span>nction (info, enc, callback) {
  //
  // Remark: This has to be handled in the base transport now because we cannot
  // conditionally write to our pipe targets as stream.
  //
<span class="cstat-no" title="statement not covered" >  if (!this.level || this.levels[this.level] &gt;= this.levels[info.level]) {</span>
<span class="cstat-no" title="statement not covered" >    this.transport.log(info.level, info.message, info, <span class="fstat-no" title="function not covered" >fu</span>nction () {});</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  callback(null);</span>
};
&nbsp;
/*
 * Clean up error handling state on the legacy transport associated
 * with this instance.
 */
LegacyTransportStream.prototype.close = <span class="fstat-no" title="function not covered" >fu</span>nction () {
<span class="cstat-no" title="statement not covered" >  if (this.transport.close) {</span>
<span class="cstat-no" title="statement not covered" >    this.transport.close();</span>
  }
&nbsp;
<span class="cstat-no" title="statement not covered" >  if (this.transport.__winstonError) {</span>
<span class="cstat-no" title="statement not covered" >    this.transport.removeListener('error', this.transport.__winstonError);</span>
  }
};
&nbsp;</pre></td></tr>
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